PHOTOCHROMIC SPIROXAZINES, COMPOSITIONS AND ARTICLES CONTAINING THEM
    8.
    发明授权
    PHOTOCHROMIC SPIROXAZINES, COMPOSITIONS AND ARTICLES CONTAINING THEM 失效
    PHOTO CHROME spiroxazines,制剂和包含对象

    公开(公告)号:EP0850427B1

    公开(公告)日:2002-03-27

    申请号:EP96926107.2

    申请日:1996-07-22

    发明人: CHAN, You-Ping

    IPC分类号: C07D498/10 G03C1/685

    摘要: The invention concerns photochromic compounds having formula (I), where R is a polycyclic group formed by at least one alicyclic group linked to, bridged or condensed, with at least one other aliphatic and/or aromatic ring, which rings contain, optionally, at least one heteroatom and/or at least one unsaturation, R -R can have different meanings, A represents a (hetero)aromatic ring which can be substituted and n is a whole number. Preferably, R is an asymmetric bicyclic group such as a norbornyl group. Application to the production of photochromic articles of organic polymers, notably lenses.